CN109058180A - A kind of gas jet limit imbibition method - Google Patents
A kind of gas jet limit imbibition method Download PDFInfo
- Publication number
- CN109058180A CN109058180A CN201810936203.XA CN201810936203A CN109058180A CN 109058180 A CN109058180 A CN 109058180A CN 201810936203 A CN201810936203 A CN 201810936203A CN 109058180 A CN109058180 A CN 109058180A
- Authority
- CN
- China
- Prior art keywords
- foam
- imbibition
- pressure
- gas jet
- addition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/06—Fluids used for spraying
Abstract
The invention discloses a kind of gas jet limit imbibition methods, are related to fluent material addition applied technical field.The critical geometry choking phenomenon occurred when flowing through jet stream using high-speed flow is designed as imbibition operating point, realizes the accurate quantitative addition to sucked liquid.This method is very suitable for that wind pressure is abundant and the insufficient Work places of hydraulic pressure, with strong applicability, reliability is high, it is easy to operate, the distinguishing feature of essential safety, based on this method propose underground goaf inhibition foam fire extinguishing process systems, it breaches and restricts the technical bottleneck that foaming agent stablizes addition, the operation of addition link is significantly simplified, improve inhibition foam fire extinguishing Core equipment applicability, the addition manner can also be used for the accurate proportioning of ground fire fighting gas foam fire-fighting foaming agent simultaneously, the addition of foam dust-removing foaming agent micro-control, petrochemical industry place reagent, the addition etc. of pigment, application has a extensive future.
Description
Technical field
A kind of gas jet limit imbibition method of the present invention is related to fluent material addition applied technical field, more particularly to
Foaming agent adds field in the preparation of coal mine gob fire foam.
Background technique
Coal spontaneous combustion is the major casualty of progress of coal mining, with wideling popularize for top coal caving mining, erecting dense individual props height
Greatly, leave that residual coal is more, it is serious to leak out, spontaneous combustion of coal is frequent.The mine fire in statistics display China 90% is drawn by coal spontaneous combustion
It rises, wherein nearly 60% occurs in underground goaf, a large amount of coal resources are not only burnt in goaf coal spontaneous combustion, but also easily induce gas
Explosion, causes bigger casualties and property loss.
Field practice has shown that high power inhibition foam is the effective means for preventing and treating goaf coal spontaneous combustion fire, and realizes foam
The addition of stablizing of agent is to ensure that the premise that fire foam is reliably prepared, however, being precisely controlled for foaming agent is this technology always
The bottleneck that difficulty or ease are broken through causes the regulation of fire foam preparation process operating condition difficult, and system fluctuation of service is cumbersome, is applicable in
Property it is limited, seriously constrain the scale application of this technology.
Currently, jet flow negative pressure imbibition is to apply liquid addition manner the most universal, but when use traditional approach imbibition, penetrate
Stream imbibition is influenced significant by pressure ratio, and the minor fluctuations of back pressure will cause imbibition negative pressure variation, and imbibition is unstable, and accurate addition is real
Existing difficulty, while the loss of jet stream imbibition process is larger, partial loss is more than 70%, for underground goaf foam fire-fighting, if
Using traditional hydraulic drives jet stream imbibition, excessive difference pressuring loss will cause liquid absorption device outlet pressure insufficient, form low back pressure,
Subsequent drive insufficient pressure, foam is unstable, and pulse phenomenon is obvious, generates the insufficient weak foam of momentum.
For this purpose, making full use of underground pressure air abundant, hydraulic pressure the invention proposes the method using the imbibition of the gas jet limit
Insufficient feature, to press wind to realize the long range of foam using pressure water/slurry later as the accurate addition of power realization foaming agent
Driving not only simplifies the operation of foaming agent adding procedure, also improves the stability of system overall operation.
Summary of the invention
In view of this, the present invention provides a kind of gas jet limit imbibition method, breaks through and restrict the stable addition of foaming agent
Technical bottleneck significantly simplifies the operation of addition link, improves inhibition foam fire extinguishing Core equipment applicability.
Technical solution: when flowing through jet nozzle using air-flow, speed is gradually increased to local velocity of sound, the critical geometry of appearance
Choking phenomenon is designed as imbibition operating point, and under the critical condition, imbibition negative pressure is not influenced by outlet back pressure floating, imbibition
Negative pressure is to determine value, and sucked liquid sucks fluidic device by stablizing under constant inside and outside differential pressure effect.
The utility model has the advantages that being very suitable for wind pressure since gas jet limit imbibition method of the present invention is to press wind as power and filling
Abundant and insufficient Work places of hydraulic pressure can be used, together in the flow chart that foaming agent, retardant, emulsifier are added in underground
When the addition manner can also be used for the accurate proportioning of ground fire fighting gas foam fire-fighting foaming agent, foam dust-removing foaming agent micro-control adds
Add, the fields such as addition of part petrochemical industry place reagent, pigment have strong applicability, and reliability is high, easy to operate, essential safety
Distinguishing feature, application has a extensive future.
Based on gas jet limit imbibition method, a kind of underground goaf inhibition foam fire extinguishing process system is proposed, with
Realize the efficient improvement to spontaneous combustionof coal in large space goaf.System mainly include pressure air pipe, water supply line, filter,
Regulating valve, ejector, foam maker, connector, foam pipeline, inhibition foam agent fluid reservoir etc., wherein ejector utilizes gas
The accurate quantitative addition of jet stream limit imbibition method progress inhibition foam agent.Pressure air pipe is compressed by pressure wind connector and underground
Air or note nitrogen pipeline are connected directly, and water supply line is connected by water connector and underground static pressure water phase, inhibition foam agent fluid reservoir
It is connect by pipette with ejector, the mixing liquid pipe of ejector outlet is connect with foam maker, and foam maker outlet is defeated by foam
Send pipe that foam is filled into goaf.
The utility model has the advantages that simplifying the operational sequence of foaming agent addition link using gas jet limit approach imbibition, improving
Inhibition foam is put out a fire Core equipment applicability.Using inhibition foam good fluidity, accumulation property is strong, adhesiveness is big and multiple is high
Advantage can be filled into the goaf high position fire source region that general liquid-solid medium is difficult to reach, so using inert gas as carrier
Afterwards using the resistance inhibition coal spontaneous combustion of the cooling of water (slurry), inert gas asphyxiating and foam, in quick displacement goaf
The high temperature heat that coal spontaneous combustion generates realizes the quick improvement to goaf high position concealed fire, ensures Mine Safety in Production.
Preferably, to realize the imbibition of the gas jet limit, should occur normal shock wave in jet diffusion pipe, jet exit is without tiltedly sharp
Wave, no underexpansion and swelling transition phenomenon.
Preferably, the condition for reaching gas jet limit imbibition is P** (lower critical pressure ratio) < Pb/P0≤ P* is (upper critical
Pressure ratio), optimum condition Pb/P0Equal to upper critical pressure ratio P*.
Preferably, regulating valve is arranged before the filter, and the filter on pressure air pipe is straight to the filtering of solid impurity
Diameter is less than 1mm, and drag losses are less than 10%.
Preferably, mixing liquid pipe connect angle [alpha] with foam maker less than 60 °.
Preferably, working face bottom (top) plate tunnel can be managed using the existing slip casting of working face (nitrogen) or be passed through to inhibition foam
Perfusion drill to goaf, when being perfused using slip casting (nitrogen) pipe, built-in pipe outlet is apart from 20~60m of working face, using drilling
When perfusion, the terminal that need to ensure to drill is fallen in mentioned-above horizontal extent.
Detailed description of the invention
Fig. 1 is a kind of gas jet limit imbibition method working principle diagram of the present invention；
Fig. 2 is a kind of underground goaf inhibition foam fire extinguishing process system of the present invention；
In figure: 1- inlet flow pipe；2- jet nozzle；3- collapsible tube；4- trunnion；5- diffuser；6- exports rectifying tube；7-
Pipette；8- pipe quick coupling；9- high-pressure air hose；10- wind regulating valve；11- wind filter；12- ejector；13- mixes liquid pipe；
14- fast joint of waterpipe；15- high pressure water/slurry pipe；16- water regulating valve；17- water/slurry filter；18- foam maker；19- foam is defeated
Send pipe；20- drill pipe；21- built-in pipe；22- non-return valve；23- micro-regulating valve；24- inhibition foam agent fluid reservoir；25- filtering
Device.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, a kind of gas jet limit imbibition method of disclosure of the invention, its working principle is that: subsonic airflow
When entering jet nozzle (2) through inlet flow pipe (1), since jet area area reduces, air velocity is gradually increased, and is being sprayed
Mouth near exit reaches local velocity of sound, at this time gasflow mach number M=1, and high speed turbulent fluctuation gas jet forms strong boundary effect,
In collapsible tube (3), stream pressure is gradually decreased to atmospheric pressure hereinafter, and reaching minimum negative pressure, such as Fig. 1 near trunnion (4) front end
In (a) Dao (b) variation.
Reduce jet exit back pressure and import pressure ratio Pb/P0, Mach number M will break through 1 in the jet diffusion pipe (5), reach
Hypersonic flow, diffuser (5) is interior to there is normal shock wave, and pressure, speed, variable density are violent after shock wave front, and ellipse as shown in figure 1 is empty
Line mark, normal shock wave is like energy-absorbing buffering wall, has separated influence of the variation to upstream of downstream flow parameter, thus jet stream goes out
Any variation of mouth back pressure all will not influence the state parameter at the liquid sucting port of upstream, the partition effect formed using the normal shock wave,
The imbibition negative pressure for controlling upstream maintains determining value, and then is precisely controlled liquid absorption amount, and sucked liquid is stablized by pipette (7) to be inhaled
Enter.
Continue to reduce pressure ratio Pb/P0, normal shock wave in diffuser (5) downstream, such as Fig. 1 gradually downward are being spread at this time
Pipe is outer to there is oblique shock wave, according to pressure ratio Pb/P0Reduction degree, outlet rectifying tube (6) end underexpansion and expansion will occur
Excessive two kinds of phenomenons, (e) as shown in figure 1 and (g), though the appearance of two kinds of phenomenons will not influence the flow parameter of upstream liquid sucting port,
But since shock wave is moved to jet exit position, acutely, the floating of outlet back pressure will be right for the variation of the flow parameters such as outlet pressure
Subsequent flowing generates unstable negative effect, thus is while realizing that gas jet realizes that stable imbibition and total system are steady
It is fixed, should occur normal shock wave in jet diffusion pipe, jet exit is without oblique shock wave, no underexpansion and parectasis phenomenon, according to figure
1, at this point, jet exit back pressure and import pressure ratio Pb/P0Have to be larger than lower critical pressure ratio P**.
Reaching jet geometry to be jammed is the primary premise for realizing the imbibition of the gas jet limit, according to Fig. 1, increases pressure ratio
Pb/P0When, normal shock wave gradually moves up, and it is straight to be only moved near liquid sucting port, continue to increase Pb/P0, liquid sucting port position flow parameter will
It changes, choking phenomenon will disappear, and stablizing imbibition will not be able to maintain, and therefore, reach geometry and be jammed and need jet exit back pressure
With import pressure ratio Pb/P0Theoretically reach gas jet in conjunction with the conclusion in [0022] no more than upper critical pressure ratio P*
The condition of limit imbibition is P** < Pb/P0≤P*。
It is practical to consider the subsequent drive problem after liquid is inhaled using during the gas jet limit, it is too low
Pressure ratio Pb/P0(especially PbIt is too low) it will lead to driveability reduction after liquid is inhaled, can not be driven, even subsequent pressure
Power is excessively high to cause fluid to backflow, and destroys jet stream imbibition process.It is, therefore, necessary to guarantee jet stream pressure ratio Pb/P0It is as high as possible, therefore,
The optimum condition of gas jet limit imbibition is jet exit back pressure and import pressure ratio Pb/P0Equal to upper critical pressure ratio P*,
(b) curve as shown in figure 1.
Fig. 2 is based on gas jet limit imbibition method, and the underground goaf inhibition foam fire extinguishing process system of proposition is
System includes air hose quick coupling (8), high-pressure air hose (9), wind regulating valve (10), wind filter (11), ejector (12), mixed liquor
Manage (13), fast joint of waterpipe (14), high pressure water/slurry pipe (15), water regulating valve (16), water/slurry filter (17), foam maker
(18), foam pipeline (19), drilling (20), built-in pipe (21), non-return valve (22), micro-regulating valve (23), inhibition foam agent
Fluid reservoir (24) and filter (25).Wherein high-pressure air hose (9) passes through pressure wind quick coupling (8) and underground compressed air or note nitrogen
Pipeline is connected directly, and high pressure water/slurry pipe (15) is connected by fast joint of waterpipe (14) and underground static pressure water phase, inhibition foam agent storage
Flow container (24) is connect by pipette (7) with ejector (12), the mixing liquid pipe (13) and foam maker of ejector (12) outlet
(18) it connects, foam maker (18) outlet is connect with foam pipeline (19).
Underground goaf foam fire-fighting process flow are as follows: gas is filtered by high-pressure air hose (9) through wind regulating valve (10) and wind
Device (11) enters ejector (12), in ejector (12), realizes limit imbibition, inhibition foam liquid warp using high-speed gas jet
Storage tank (24) sucks ejector (12) by pipette (7), is mixed into pressure wind and mixes liquid pipe (13), high pressure water/slurry is through pipeline
(15) water regulating valve (16) and water being arranged on/slurry filter (17) enter foam maker (18), and mix the gas in liquid pipe (13)
In foam maker (18) strong collision, shearing, stretching occur at high speeds for body and the mixing of inhibition foam liquid between multiphase flow, formed
The big flow high power inhibition foam of dense uniform is filled into goaf through foam pipeline (19).
For filter convenient for safeguarding, ejector and foam maker, the regulating valve on air hose and water/slurry pipe need to be arranged in filter
Before, filter (11) requirement and on pressure air pipe is more stringent, and strainer need to be less than 1mm to the filter diameter of solid impurity,
To ensure that ejector trunnion position (4) will not be blocked because of solid particle, while too small filter diameter also will increase filter
(11) resistance, thus filter resistance loss should be less than 10%.
For the energy loss for reducing gas-liquid mixed process in foam maker, the connection of liquid pipe (13) and foam maker (18) is mixed
Angle [alpha] is not preferably greater than 60 °.
The instillation process of inhibition foam are as follows: working face bottom (top) plate is managed or passed through using the existing slip casting of working face (nitrogen)
Tunnel, which is drilled, to be perfused to goaf, and when being perfused using slip casting (nitrogen) pipe, built-in pipe (21) is exported apart from 20~60m of working face,
Using drill be perfused when, need to ensure drill (20) terminal fall in mentioned-above horizontal extent.
Due to the good fluidity of inhibition foam, accumulation property is strong, adhesiveness is big and multiple is high, thus can be filled into general liquid
Gu medium is difficult to the goaf high position fire source region reached, cooling, inert gas asphyxiating and the bubble of water (slurry) are then utilized
The resistance of foam inhibits coal spontaneous combustion, and the high temperature heat that coal spontaneous combustion generates in quick displacement goaf is realized hidden to a goaf high position
The quick improvement of fire source is covered, ensures Mine Safety in Production.
Since gas jet limit imbibition method proposed by the present invention is to press wind as power, thus it is very suitable for wind pressure and fills
The abundant and insufficient Work places of hydraulic pressure, and mine fire emergency relief process such case frequently encounters, and occurs often due to water
Pressure is insufficient and can not reliable imbibition the problem of, therefore gas jet limit imbibition method is highly suitable for underground goaf resistance bubble
The preparation of foam has strong applicability, and reliability is high, easy to operate distinguishing feature, while the imbibition is electrical without metering pump etc.
Quantitative addition can be realized in equipment, has been inherently eliminated the possibility for generating electric spark, has height intrinsic safety.
Gas jet limit imbibition method, which breaches, restricts the technical bottleneck that foaming agent stablizes addition, has significantly simplified addition
The operation of link improves inhibition foam fire extinguishing Core equipment applicability, needs foaming agent, retardant, emulsifier to add in underground
It can be used in the flow chart added, while the addition manner can also be used for the accurate of ground fire fighting gas foam fire-fighting foaming agent
Proportion, the addition of foam dust-removing foaming agent micro-control, the addition of part petrochemical industry place reagent, pigment, application have a extensive future.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. the invention discloses a kind of gas jet limit imbibition method, this method is reached at efflux nozzle using high-speed gas
When the critical condition of local velocity of sound, the limit choking phenomenon of appearance is designed as imbibition operating point, under the critical condition, imbibition
Negative pressure is not influenced by outlet back pressure floating, and imbibition negative pressure is to determine value, and sucked liquid is under constant inside and outside differential pressure effect, quilt
Stablize sucking fluidic device.
2. gas jet limit imbibition method according to claim 1, which is characterized in that realize that the gas jet limit is inhaled
There is normal shock wave in jet diffusion pipe in liquid, and jet exit is without oblique shock wave, no underexpansion and swelling transition phenomenon.
3. gas jet limit imbibition method according to claim 1, which is characterized in that reach gas jet limit imbibition
Condition be P** (lower critical pressure ratio) < Pb/P0≤ P* (upper critical pressure ratio), optimum condition Pb/P0Equal to upper critical pressure
Compare P* by force.
4. a kind of gas jet limit imbibition method according to claim 1, proposes a kind of underground goaf foam and go out
Firer's process system, it is characterised in that: process system mainly include pressure air pipe, water supply line, filter, regulating valve, ejector,
Foam maker, connector, foam pipeline, inhibition foam agent fluid reservoir etc., wherein ejector utilizes gas jet limit imbibition side
The accurate quantitative addition of method progress inhibition foam agent.
The process system 5. underground goaf inhibition foam according to claim 4 is put out a fire, which is characterized in that pressure air pipe is logical
Over-voltage wind connector is connected directly with underground compressed air or note nitrogen pipeline, and water supply line passes through water connector and underground static pressure water
It is connected, inhibition foam agent fluid reservoir is connect by pipette with ejector, and the mixing liquid pipe of ejector outlet is connect with foam maker,
Foam is filled into goaf by foam pipeline by foam maker outlet.
6. regulating valve according to claim 4 and filter, which is characterized in that regulating valve arrange before the filter, and
Filter on pressure air pipe is less than 1mm to the filter diameter of solid impurity, and drag losses are less than 10%.
7. mixing liquid pipe according to claim 5 is connect with foam maker, which is characterized in that connection angle [alpha] is less than 60 °.
8. goaf technique is perfused in foam according to claim 5, which is characterized in that foam can be existing using working face
Slip casting (nitrogen) is managed or is drilled by working face bottom (top) plate tunnel and is perfused to goaf, when being perfused using slip casting (nitrogen) pipe,
Built-in pipe outlet apart from 20~60m of working face, using drill be perfused when, the terminal that need to ensure to drill falls in mentioned-above horizontal model
In enclosing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936203.XA CN109058180B (en) | 2018-08-16 | 2018-08-16 | Gas jet limit imbibition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936203.XA CN109058180B (en) | 2018-08-16 | 2018-08-16 | Gas jet limit imbibition method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058180A true CN109058180A (en) | 2018-12-21 |
| CN109058180B CN109058180B (en) | 2020-02-14 |
Family
ID=64687199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810936203.XA Active CN109058180B (en) | 2018-08-16 | 2018-08-16 | Gas jet limit imbibition method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109058180B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195610A (en) * | 2019-05-09 | 2019-09-03 | 中国矿业大学 | A kind of critical dry and wet dust-extraction unit of mining two-stage ultrafiltration |
| CN113144797A (en) * | 2021-04-06 | 2021-07-23 | 中国矿业大学(北京) | Adjustable vacuum jet entrainment industrial dust purification method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2046931C1 (en) * | 1992-10-26 | 1995-10-27 | Александр Константинович Шевченко | Apparatus for oil deposit development (versions) |
| CN102228813A (en) * | 2011-05-19 | 2011-11-02 | 中国矿业大学 | Apparatus for automatically adding foaming agent |
| CN103691351A (en) * | 2013-12-06 | 2014-04-02 | 中国矿业大学 | Jet flow self-absorption foaming agent parallel foaming system |
| CN103861511A (en) * | 2014-02-19 | 2014-06-18 | 中国矿业大学 | Mining porous spiral-type foam generating device |
| CN104504252A (en) * | 2014-12-10 | 2015-04-08 | 广西大学 | Evaluation method for efficiency of pressure expanding chamber of ejector in transcritical CO2 refrigeration circulation |
-
2018
- 2018-08-16 CN CN201810936203.XA patent/CN109058180B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2046931C1 (en) * | 1992-10-26 | 1995-10-27 | Александр Константинович Шевченко | Apparatus for oil deposit development (versions) |
| CN102228813A (en) * | 2011-05-19 | 2011-11-02 | 中国矿业大学 | Apparatus for automatically adding foaming agent |
| CN103691351A (en) * | 2013-12-06 | 2014-04-02 | 中国矿业大学 | Jet flow self-absorption foaming agent parallel foaming system |
| CN103861511A (en) * | 2014-02-19 | 2014-06-18 | 中国矿业大学 | Mining porous spiral-type foam generating device |
| CN104504252A (en) * | 2014-12-10 | 2015-04-08 | 广西大学 | Evaluation method for efficiency of pressure expanding chamber of ejector in transcritical CO2 refrigeration circulation |
Non-Patent Citations (1)
| Title |
|---|
| 陆新晓: ""防治大空间煤炭自燃的泡沫高效制备技术及应用研究"", 《防治大空间煤炭自燃的泡沫高效制备技术及应用研究》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195610A (en) * | 2019-05-09 | 2019-09-03 | 中国矿业大学 | A kind of critical dry and wet dust-extraction unit of mining two-stage ultrafiltration |
| CN110195610B (en) * | 2019-05-09 | 2024-03-08 | 中国矿业大学 | Mining two-stage ultrafiltration critical dry-wet dust collector |
| CN113144797A (en) * | 2021-04-06 | 2021-07-23 | 中国矿业大学(北京) | Adjustable vacuum jet entrainment industrial dust purification method and device |
| CN113144797B (en) * | 2021-04-06 | 2022-06-17 | 中国矿业大学(北京) | Adjustable vacuum jet entrainment industrial dust purification method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109058180B (en) | 2020-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103084022B (en) | Self-absorption air type cyclone foaming device for dust removal of coal mine | |
| RU2620335C2 (en) | Device for creation of fluid rigid foam for fire prevention and extinguishing in coal mine | |
| CN103691351B (en) | A kind of jetted self-priming blowing agent foamed system in parallel | |
| CN106703869B (en) | A kind of fully mechanized workface comprehensive dust prevention system | |
| Ren et al. | Application of foam technology for dust control in underground coal mine | |
| US4828038A (en) | Foam fire fighting apparatus | |
| CN103046949B (en) | Bias gas-liquid two-phase jet-flow slotting permeability-increasing device and method | |
| CN109058180A (en) | A kind of gas jet limit imbibition method | |
| CN106362332A (en) | Full-size three-phase-jet foam generating device | |
| US4830794A (en) | Dry sand foam generator | |
| CN103570375A (en) | Preparation method and device of foam gel for coal spontaneous combustion treatment | |
| CN104632269B (en) | Differential mine dust falling agent automatic adding device | |
| CN107519777A (en) | A kind of parallel jet vaporizes quantitative adding device | |
| CN102606189B (en) | Fire extinguishing and cooling system for coal cavities and loose areas in fire district of coal field | |
| Wang et al. | Experimental study and implementation of a novel internal foam spraying system for roadheaders | |
| CN203620127U (en) | Solidified foam fluid generation device for fire prevention and extinguishment of coal mines | |
| CN109296399A (en) | Underground goaf, which is leaked out, prevents and treats device | |
| Lu et al. | A new design of double-stage parallel adding equipment used for dust suppression in underground coal mines | |
| Lu et al. | A new adding method of foaming agent used for foam dust suppression in underground coal mines | |
| CN110448828B (en) | Positive pressure type three-phase foam generating device and method and application | |
| US20170259091A1 (en) | Fire-fighting system | |
| CN103089262B (en) | Self-adsorption air type foam dust suspension system for coal mining working face | |
| CN110898741B (en) | Oil field is with fly ash reinforcing foam forming device and application thereof | |
| CN104847400B (en) | Fire preventing and extinguishing method by injecting high-water-content foaming materials into underground coal mine goaf | |
| CN203663776U (en) | Parallel foaming system for jet flow self-absorption foaming agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |